About Insulin Calculator

Meet the Founder

Ryan Mitchell

Founder & Editor · Insulin Calculator

Hi, I'm Ryan Mitchell, founder and editor of Insulin Calculator, an independent educational project that helps users understand insulin dosing formulas and calculations. I work as a medical representative and have experience in the healthcare and pharmaceutical industry.

Every calculator on this website is built with transparency in mind, with formulas, assumptions, and sources clearly published and cited. The content is for educational purposes only and should not replace professional medical advice, diagnosis, or treatment. Whenever possible, content is reviewed against established clinical guidelines and reputable medical sources.

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“I built Insulin Calculator on one rule: never ask anyone to trust a number they can't trace. Every formula here is published, cited, and shown alongside your own figures — so you can check the math, understand it, and take it to your care team with confidence.”

Our Editorial & Review Team

Three people stand behind the content on this site, in clearly separated roles. We name all of them, state exactly what each one is responsible for, and link out so you can verify their credentials independently.

Max Lee

Medical Writer · Insulin Calculator

Max Lee is a medical communications and evidence development specialist at Costello Medical in New York, and joined Insulin Calculator as medical writer in August 2026. Their background is in translating clinical evidence into accurate, readable material — the discipline this site depends on, since every calculator has to explain a published formula without distorting it.

Max writes and updates the clinical explanatory content: how each formula is derived, where it comes from, what it assumes, and where it stops being reliable. Pages they write carry their byline. Pages published before August 2026 remain credited to Ryan Mitchell — we do not reassign authorship to someone who did not write the work.

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Dr. Chhaya Makhija, MD, DipABLM

Medical Reviewer · Endocrinology

Triple board-certified in Internal Medicine, Endocrinology & Metabolism, and Lifestyle Medicine, and founder of Unified Endocrine & Diabetes Care in Fresno, California. She reviews the clinical logic behind the dosing calculators, the safety messaging and the educational guides.

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Gabriel A. Sánchez Barreras, DVM

Veterinary Reviewer

A licensed veterinarian in Arlington, Texas, recommended to us by Dr. Makhija. He reviews the five veterinary insulin pages, which fall outside a human-medicine reviewer's scope of practice — several veterinary insulins are U-40 rather than U-100, and cats can achieve diabetic remission.

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Our Mission

Insulin Calculator exists to make the math behind diabetes care clear and freely accessible — to patients, caregivers, students, and anyone learning how insulin dosing actually works. We believe people managing diabetes deserve accurate, jargon-free educational resources without paywalls, logins, or hidden assumptions.

Insulin dosing is one of the most consequential things a person does for their own health, and misunderstanding the formulas behind it can be dangerous. Our goal is to close the gap between clinical knowledge and everyday understanding — not to replace your provider, but to help you have better, more informed conversations with them.

How We Earn Your Trust

Every formula is sourced

We don't invent dosing math. Each calculator uses a formula that is:

• Published in peer-reviewed literature or major clinical guidelines (ADA, AACE, NIDDK, CDC)
• Cited on the page, with the specific source named and linked where possible
• Shown transparently — the equation and your exact inputs appear with every result
• Framed as an estimate, never as a prescription or a definitive dose

Content is reviewed and dated

Clinical content is written against primary sources (listed on each page) and checked against the current ADA Standards of Care in Diabetes. Every substantive page carries a “Last reviewed” date, and we revisit pages when guidelines change.

Our medical reviewer

Since August 2026, our clinical content has been reviewed by Dr. Chhaya Makhija, MD, DipABLM — a triple board-certified physician in Internal Medicine, Endocrinology & Metabolism and Lifestyle Medicine, and founder of Unified Endocrine & Diabetes Care in Fresno, California. She reviews the clinical logic behind the dosing calculators, the safety messaging and the educational guides. Our five veterinary calculators fall outside her scope of practice and are not covered by her review.

Pages she has reviewed carry a “Medically reviewed by Dr. Chhaya Makhija, MD, DipABLM” byline with the review date. Her full credentials, professional history and independent verification links are published on her reviewer profile — we publish them precisely so you can check them yourself.

Our veterinary reviewer

Our five veterinary calculators are reviewed separately by Gabriel A. Sánchez Barreras, DVM, a licensed veterinarian in Arlington, Texas, recommended to us by Dr. Makhija. Veterinary insulin dosing differs from human dosing in ways a human-medicine qualification does not cover — several veterinary insulins are U-40 rather than U-100, and cats can achieve diabetic remission — so those pages needed their own reviewer rather than a stretched scope. His reviewer profile explains exactly which credential applies and why.

Our medical writer

Clinical explanatory content is written by Max Lee, a medical communications and evidence development specialist at Costello Medical in New York. They joined in August 2026, and pages they write carry their byline. Pages published before that date remain credited to Ryan Mitchell — we do not reassign authorship to someone who did not write the work.

What we will never do

• Fabricate credentials, reviewers, testimonials, or trust badges
• Claim our founder or team are doctors when they are not
• Present a calculator's output as a prescription or clinical recommendation
• Use formulas that lack published clinical support
• Let advertising influence clinical content
• Collect or transmit your health data — every calculation runs locally in your browser

Our Honesty About Expertise

Because this is a health-related site, we want to be completely clear about what we are — and what we are not. Insulin Calculator is an educational publisher, not a medical practice. Our founder and contributors are not your healthcare providers, and using this site does not create any clinician–patient relationship.

What we bring is editorial rigor: faithful reproduction of well-established, published formulas; transparent calculations you can verify; and clear, repeated signposting to professional care. The clinical authority behind the numbers belongs to the sources we cite — the ADA, AACE, NIDDK, and the peer-reviewed researchers who developed and validated these methods. Where a calculation touches higher-risk situations (children, pregnancy, IV insulin, severe resistance), we say plainly that specialist supervision is essential.

Who This Site Is For

• People with diabetes and their caregivers who want to understand the logic behind a dose
• Nursing, pharmacy, and medical students learning clinical calculation methods
• Diabetes educators and coaches who explain these concepts to others
• Anyone curious about the math behind insulin therapy

These tools are not a substitute for a certified diabetes care and education specialist (CDCES), endocrinologist, or primary care physician. If you are newly diagnosed, changing regimens, or managing complications, work directly with your care team.

Accuracy & Limitations

Standard formulas like the 500 Rule (insulin-to-carb ratio) and the 1800 Rule (sensitivity factor) are widely used as starting points. They are not precise for every individual, because real insulin requirements shift with:

• Physical activity level and exercise timing
• Diet beyond carbohydrate counting (fat, protein, glycemic index)
• Stress, illness, and hormonal changes
• Kidney and liver function
• Other medications
• The specific insulin and injection site

We acknowledge these limits on every tool page and ask you to treat all outputs as educational estimates to verify with your provider.

Who Operates This Site & How to Reach Us

We believe a trustworthy health resource should be accountable and easy to reach. Insulin Calculator is independently operated, and you can contact a real person with corrections, questions, or feedback — we especially welcome corrections from clinicians and educators.

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